diff -r a1323efc5753 -r 07c32a103bbb src/work/alpar/gwrapper.h
--- a/src/work/alpar/gwrapper.h	Tue Mar 02 14:51:13 2004 +0000
+++ b/src/work/alpar/gwrapper.h	Tue Mar 02 15:45:27 2004 +0000
@@ -117,6 +117,61 @@
 };
 
 template<typename G>
+class RevGraphExt : public G
+{
+public:
+  //  typedef G BaseGraph;
+
+  typedef typename G::EdgeIt EdgeIt;
+  
+  typedef typename G::InEdgeIt OutEdgeIt;
+  typedef typename G::OutEdgeIt InEdgeIt;
+  typedef typename G::SymEdgeIt SymEdgeIt;
+  typedef typename G::EachEdgeIt EachEdgeIt;
+
+  typedef typename G::NodeIt NodeIt;
+    
+//   template<typename I> I &getFirst(I &i); { return graph->getFirst(i); }
+//   template<typename I,typename P> I &getFirst(I &i,const P &p);
+//   { return graph->getFirst(i,p); }
+//   template<typename I> I next(const I i); { return graph->goNext(i); }
+//   template<typename I> I &goNext(I &i); { return graph->goNext(i); }
+
+  NodeIt head(const EdgeIt &e);
+  { return G::tail(e); }
+  NodeIt tail(const EdgeIt &e);
+  { return G::head(e); }
+  
+//   template<typename I> NodeIt aNode(const I e);
+//   { return graph->aNode(e); }
+//   template<typename I> NodeIt bNode(const I e);
+//   { return graph->bNode(e); }
+  
+//   template<typename I> bool valid(const I i);
+//   { return graph->valid(i); }
+  
+//   template<typename I> void setInvalid(const I &i);
+//   { return graph->setInvalid(i); }
+  
+//   NodeIt addNode(); { return graph->addNode(); }
+
+  EdgeIt addEdge(const NodeIt from,const NodeIt to);
+  { return G::addEdge(to,from); }
+  
+//   template<I> void delete(I i); { graph->delete(i); }
+  
+//   void clean();  { graph->clean(); }
+  
+//   template<class T> class NodeMap : public typename G::NodeMap<T>;
+//   template<class T> class EdgeMap : public typename G::EdgeMap<T>;
+  
+//   void SetG(G &g) {graph = &g;}
+  
+//   RevGraphWrapper() {graph = NULL;}
+//   RevGraphWrapper(G &g) {graph = &g;}
+};
+
+template<typename G>
 class SymGraphWrapper
 {
   G *graph;
@@ -173,6 +228,23 @@
 };
 
 
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 // FIXME: comparison should be made better!!!
 template<typename G, typename lomap, typename fmap, typename himap>
 class ResGraphWrapper